John shaw



(No Model.)

J. SHAW.

ADJUSTABLE STOVE BACK. No. 430,699. Patented June 24, 1890.

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UNTTED STATES PATENT OFFICE.

JOHN SIIAW, OF HAUGHVI'LLE, ASSIGNOR TO THE ACORN STEAM ISOILER AND HEATING COMPANY, OF INDIANAPOLIS, INDIANA.

ADJ USTAB LE STOVE|BAC K.

SPECIFICATION forming part of Letters Patent No. 430,699, dated J une 24, 1890. Application filed February 18, 1890i Serial No. 340,911. (No model.)

To all whom t may concer/L:

Be it known that I, JOHN SHAW, a citizen ot` the United States, residing at I-Iaughville, in the county of Marion and State of Indiana, have `invented certain new and useful Improvements in Adjustable Stove Backs, of which the following is a specification.

My said invention relates to that class of devicesused to renew the backs of the tirepots in stoves, especially cook-stoves; and it consists in a construction and arrangement of parts whereby said devices are rendered easily accurately adjustable to iit varioussized stoves, as will be hereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made apart hereof, and on which similar letters of reference indicate similar parts, Figure l is a front elevation of a iireback embodying my said invention; Fig. 2, a rear elevation of the same; Fig. 3, a horizontal sectional view looking downwardly from the dotted line 3 3; Fig. 4, an end elevation as seen from the left-hand end of Fig. l 5 and Figs. 5, 6, and 7, vertical sectional views on the dotted lines 5 5, 6 6, and 7 '7, respectively.

In said drawings,the portions marked A represent the central or main portion of my improved re-back; B B', the end wings thereto by which the length of said back may be in creased; C C', plates by which the width may be increased, and D D the bolts by which the several parts are secured together.

The main portion A is in many respects similar to an ordinary solid tire-back. It is provided at its lower edge with a rib o of a height about equal to the thickness of the end wings B B', (the inner ends of which pass above it,) which extends along its central portion and serves to support the plate C, which rests thereon whenV the parts are assembled as shown in Figs. 6 and 7. It has also small grooves d', (see Figs. 1l and 5,) in which corresponding small ribs b on the wings B B rest, whereby said wings are guided and kept in parallel relation with said main part and also adjusted to their various positions. IIoles are also provided in this main 'part through which the bolts D D pass, which hold the several parts of the structure together when they are assembled in operative position. The wings B Brest against the back side of the main part A, to which they are secured by the bolts. The holes through which said bolts pass are in the form of long slots, as shown, and said wings are thus adjustable on said bolts, and the length of the structure is thus adapted to be increased. They are provided with hook-like bearings h,whicl1 engage with the upper edge of the part A, said edge being a way or slide upon which these bearings move in adjusting the device, said engagement serving to assist in holding the parts in proper relation. Upon the upper surface upon the rear side of these wings are small ribs b2, (see Fig. 5,) which engage with corresponding grooves in the plates C C and assistin holding said plates in position, as will be presently described. The plates C C are arranged at the eXtreme back of the structure as a whole when the parts are assembled,and are adapted not only to be adj usted to increase the width of the fire-back, but to follow the'wings in their longitudinal adjustment. bolts pass in these plates run longitudinally, as in the wings B B', and vertically and also diagonally, thus permitting of an independent longitudinal adjustment, an independent vertical, and a combined longitudinal and vertical adjustment. The slots all start from a common point,and the adjustment at each end is thus adapted to be made over a single bolt, as will be readily understood. Extending out from the diagonal slots are also small side slots which permit of afurther vertical adjustment after a certain combined longitudinal and vertical adjustment is made, as will be readily understood. These plates are so formed that at the center one passes beneath the other, as shown most plainlyin Fig. 3. At the eXtreme ends area series of tine grooves or corrugations, (see Fig. 5,) certain ones of which, according to the degree of adjustment, engage with the small ribs b2 on the corresponding portions of the plates B B.

Two bolts D D serve to secure the several parts ot my improved nre-back firmlv together whatever the adjustment, and, as will be readily understood from an examination of the drawings and the foregoing description, said adjustment is easily, accurately, and eX- peditiously eiected to any degree desired The slots through which the IOO Within the limits of the movements provided for.

At one end of the device will be noticed a notch n. This is to accommodate abolt which is usually located at that point in the righthand end of astove of the character for which these backs are designed, and, as Will be further noticed, the end of the plate C is correspondingly cut away, so as not to cover said notch, whatever may be the adjustment.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination,in an adjustable back, of the main part A, the Wings B B', having longitudinal slots, and the plates (J C', having both longitudinal and vertical slots,where by a combined adjustment is provided for, substantially as set forth.

2. The combination, in an adjustable fireback, of the main part A, the Wings B B', having small ribs b2, and plates C C', adapted to be adjusted outwardly to increase the length of the fire-back and downwardly to below the main part to increase its Width, and having a multiplicity of small grooves adapted to engage, respectively, with said small ribs `as the parts are Yadj usted relatively to each other and thus hold said parts securely to said adjustment, substantially as set forth.

'3. The combination, in an adjustable fireback, with the main portion thereof, of adj ustable plates having longitudinal slots,vcr tical slots, and diagonal slots starting from a common center or point,Wherebya longitudinal, a vertical, and a combined adjustment are all provided for in the same plate, substantially as set forth.

4. In an adjustable fire-back, the combination,with the main part thereof, of adjustable lates having diagonal slots Whereb a com- D e 1 Y bined adjustment is provided for, and branch slots extendingfrom said diagonal slots,where by a further adjustment is provided for, substantially as shown and described.

In Witness whereof I have hereunto set my hand and seal, at Indianapolis, Indiana, this 12th day of February, A. D. ISQO.

JOI-IN SHAW. [L s] Vitnesses:

C. BRADFORD, JAMES WALsH. 

